Title :
Design of absorptive microwave filters using allpass networks in a parallel-cascade configuration
Author :
Guyette, Andrew C. ; Hunter, Ian C. ; Pollard, Roger D.
Author_Institution :
Electron. Sci. & Technol. Div., Naval Res. Lab., Washington, DC, USA
Abstract :
A new approach to designing absorptive microwave filters using allpass networks in a parallel-cascade configuration is presented. A signal is divided into two paths, each comprised of a number of cascaded allpass networks. The two signals are then recombined, and frequency selectivity results from phase cancellation. It is shown that this approach is especially useful for dissipative loss compensation. A general method for designing the microwave allpass networks is given. Bandpass and bandstop microstrip prototypes were designed, built, and tested.
Keywords :
all-pass filters; band-pass filters; band-stop filters; cascade networks; microstrip filters; microwave filters; absorptive microwave filter; allpass network; bandpass prototype; bandstop microstrip prototype; dissipative loss compensation; frequency selectivity; parallel-cascade configuration; phase cancellation; Admittance; Band pass filters; Frequency; Matched filters; Microwave filters; Microwave technology; Power dividers; Prototypes; Reflection; Transfer functions; Microwave filters; microstrip filters;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5165801
